Boston slop-rock tricksters Vundabar are sharing a new song, “Shuffle”, with all proceeds from digital sales going to Planned Parenthood. The track hones in on the band’s sonic signatures; reverbed guitars and dry, fuzzed out drums hack out an exaggerated waltz while the band sings an elegantly constructed, hook-filled melody in a swooning falsetto. The band turns the song’s structure inside out multiple time across its three minute length, agitating for new ways to express the song’s central lyric: “I just want to hear my own voice.” One moment it’s a whisper, the next a scream.